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Answered

A carpenter builds stairs using blocks. He uses 2 blocks for one step, 6 blocks for 2 steps, 12 blocks for 3 steps and so on. How many blocks are needed to build stairs 5 steps high?

Sagot :

CAMALLAIVHANJOAQUININ

Answer: 2, 6, 12, 20, 30

In conclusion, 30 blocks is needed to build stairs with 5 steps high.

EXPLANATION:

2 - first step

2+4= 6

6- 2nd steps

6+6= 12

12- 3rd step

12+8= 20

20- 4th step

20+10= 30

30- 5th step

hope it helps